#		size sec/t hds trk stre gap  rate spec1 fmt_gap
720/1440	1440     9   2  80    0 0x2A 0x02 0xDF     0x50
1440/1440	2880    18   2  80    0 0x1B 0x00 0xCF     0x6C
1680/1440	3360	21   2  80    0 0x0C 0x00 0xCF     0x6C
